This Floor or shelf model has a CADR certified rating for rooms up to 12 feet x 13 feet ; 100 Smoke / 100 Dust / 100 Pollen and the 99.97 percent Effective True HEPA filter performance Separate carbon pre-filter offers 30 percent Better Odor Reduction. The LED filter change reminders helps in unit maintenance and the Whisper-quiet, 3-speed Hunter fan works quietly and effectively. 1 year suggested HEPA filter life.